Assays Include 84m At 0.8 g/t Gold And 0.11% Copper In Ecuador
Sunstone Metals Ltd (ASX: STM) has obtained strong assay results which show drilling intersected 505m of mineralised gold-copper porphyry at the Brama prospect within its Bramaderos project in Ecuador.
Managing Director, Malcolm Norris, said the results from hole BMDD008W1, drilled as a wedge off hole BMDD008 commencing at 347.1m downhole, further highlight the potential for Brama to host a substantial gold-copper porphyry system.
“These latest assays and visuals provide more strong evidence that Brama has the potential to be a large gold-copper mineralised porphyry,” Mr Norris said.
“We are now confident that we have a 500m vertical extent of good gold and copper grade. The porphyry plus intrusive breccia zones, at this stage, cover a surface footprint of 350m x 150m, which we expect can be expanded with more drilling.”
Holes BMDD008W1 and parent hole BMDD008 are located on the north-west side of the main Brama system. BMDD008 had intersected a strongly mineralised high-level intrusive breccia body located above the north-west edge of the main Brama in April.
The BMDD008W1 wedge hole has extended that intersection by 50m to intersect a 505m-long intersection from surface.
Mr Norris said this intersection very likely extends deeper, but still remains to be further tested in the area south and east of BMDD008W1 in similarly magnetic domains.
Both drill holes BMDD008 and BMDD008W1 extended towards a deeper magnetic anomaly but failed to intersect that target.
Gold equivalent values are included here to enable comparison, in general terms in an early-stage exploration context, to other large lower-grade gold systems, and to other porphyry systems which are often reported in metal-equivalent terms and are invariably gold and copper deposits, with both metals being targeted by exploration.
Visual inspection of drill core from BMDD009 reveals it intersected a strongly and continuously veined porphyry system hosted by diorite in its upper 515m, with visual chalcopyrite associated with intense stockwork veining. The drill hole continued to test the deeper magnetic domain, that corresponds to the deeper target in BMDD008 and BMDD008W1, and encountered peripheral stockwork magnetite veinlets that likely explain the magnetic anomaly in the wall rocks south of the main mineralised intrusive body.
The long and well-mineralised sections of holes BMDD001, BMDD002 and BMDD009 indicate that the main porphyry target on the eastern sector of Brama is defined by strongly veined diorite with moderate magnetic character.
The aim of the ongoing drilling is to further demonstrate continuity of the higher-grade zones within the extensive outer envelope of lower-grade gold-copper mineralisation at Brama.
The Bramaderos project is located in southern Ecuador and is transgressed by the bitumen Pan-American highway. The project is supported by good infrastructure, including nearby commercial airports and significant cities (Loja), access to affordable hydropower, and enjoys strong community support.
For further information please visit: https://www.sunstonemetals.com.au/